National Weather Service United States Department of Commerce

Madeline weakening as it passes just south of Hawaii; Hermine gaining strength as it moves towards Florida

The National Hurricane Center has issued a Tropical Storm Watch, Tropical Storm Warning and a Hurricane Watch for parts of the Southeastern United States as Tropical Storm Hermine churns in the eastern Gulf of Mexico. Meanwhile, Madeline in the Pacific is on a path just south of Hawaii. A Tropical Storm Warning is in effect for southern islands. Read More >

NWS State College, PA

High Impact Sub-Advisory (HISA) Snow Event Resourcea

Aerial view of I-80 near Milesburg, PA on January 6, 2004 after
an arctic front and associated snow squall caused a massive pileup.

 

Presentations/Papers  

A Quick Review of Snow Microphysics and its Relation to Heavy Snow Forecasting (.ppt), Greg DeVoir, NOAA/NWS State College, PA Winter Weather Workshop, Nov. 2002

High Impact Sub-Advisory Snow Events: The Need to Effectively Communicate the Threat of Short Duration High Intensity Snowfall (.pdf), DeVoir, G.A., 2004: 20th Conference on Weather Analysis and Forecasting, Seattle, WA

High Impact Sub-Advisory Snow Events: The Need to Effectively Communicate the Threat of Short Duration High Intensity Snowfall (.ppt), DeVoir, G.A., 2004: 20th Conference on Weather Analysis and Forecasting, Seattle, WA

Characteristics of High Impact Sub-Advisory (HISA) Snow Events in Central Pennsylvania (.ppt), Gregory A. DeVoir, NOAA/NWS State College, PA, Winter 2005 PENNDOT Meeting

High Impact Sub-Advisory Winter Weather (.ppt), Dr. John Scala, Center for Disaster Research & Education/Millersville University of Pennsylvania and WGAL-TV Broadcast Meteorologist and Greg DeVoir, NWS State College, PA, 2006 NWS State College Winter Weather Workshop

Support for High Impact Sub-Advisory Snow Events on Interstate 80 in Central Pennsylvania: A Partner Project with the Pennsylvania Department of Transportation and the Pennsylvania State Police (.ppt) , DeVoir, G.A., 2008, 16 April 2008 NWS Public Weather Managers Meeting

NWS Expands Efforts to Mitigate Effects of High Impact Sub-Advisory (HISA) Snowfall in Central Pennsylvania, Greg DeVoir and David Ondrejik, NWS State College, PA, NWS State College PA Spring 2008 SKYWARN Newsletter, Abbreviated version published in Spring 2008 Edition of Aware Report for Emergency Managers